The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Mar. 11, 1985
Applicant:
Inventor:
Richard M Berger, Midlothian, VA (US);
Assignee:
American Filtrona Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24D / ; A24D / ;
U.S. Cl.
CPC ...
15624412 ; 131362 ; 131365 ;
Abstract
A tobacco smoke filter includes a smoke pervious rod of plastic material about which a smoke impervious plastic overwrap film is extruded. In the preferred embodiment, the overwrap and the rod are made of the same material, e.g., cellulose acetate. By using the same material, waste from the normal filter-making processes can be formed into granules or pellets and rendered molten for re-cycling as the raw material for the overwrap film. The resulting filter can be used with or without a tipping paper cover and can be perforated or not, as desired, to ventilate the filter rod.